In their research on the neural correlates of delay of gratification, Casey et al. (2011) used fMRI scans during a go/no-go task.
Contrast the findings regarding activity in the prefrontal cortex (specifically the right inferior frontal gyrus) with activity in the ventral striatum when high delayers and low delayers were presented with 'hot' cues.
39 exam-style questions on OCR A Level Psychology Regions of the brain, covering Sperry (1968): Split brain study and Casey et al. (2011): Neural correlates of delay of gratification. Each one has a worked solution and a mark scheme showing where the marks go.